<style>
  .avatar-uploader .el-upload {
    border: 1px dashed #d9d9d9;
    border-radius: 6px;
    cursor: pointer;
    position: relative;
    overflow: hidden;
  }
  .avatar-uploader .el-upload:hover {
    border-color: #409EFF;
  }
  .avatar-uploader-icon {
    font-size: 28px;
    color: #8c939d;
    width: 150px;
    height: 70px;
    line-height: 150px;
    text-align: center;
  }
  .avatar {
    width: 150px;
    height: 70px;
    display: block;
  }

</style>
<template>
  <div>
    <br>

    <el-form :inline="true">
      <el-form-item label="广告位置：">
        <el-select v-model="searchMap.position" placeholder="请输入广告位置关键字搜索" filterable clearable>
          <el-option
            v-for="item in positions"
            :key="item.id"
            :label="item.value"
            :value="item.id"
          />
        </el-select>
      </el-form-item>
      <el-button type="primary" @click="fetchData()">查询</el-button>
      <el-button type="primary" @click="handleEdit('')">新增</el-button>
    </el-form>

    <!--表格组件-->
    <el-table
      :data="list"
      border
      style="width: 100%"
    >
      <el-table-column prop="id" label="id" width="200" />
      <el-table-column prop="position" label="位置：" width="200">
        <template slot-scope="scope">
          <span v-if="scope.row.position == 1">首页顶部</span>
          <span v-if="scope.row.position == 2">首页中部</span>
        </template>
      </el-table-column>
      <el-table-column prop="image" label="图片" width="200">
        <template slot-scope="scope">
          <img :src="scope.row.image" min-width="70" height="70">
        </template>
      </el-table-column>
      <el-table-column prop="description" label="描述" width="300" />
      <el-table-column prop="created" label="创建时间" width="200" :formatter="dateFormat" />

      <el-table-column
        fixed="right"
        label="操作"
        width="100"
      >
        <template slot-scope="scope">
          <el-button type="text" size="small" @click="handleEdit(scope.row.id)">修改</el-button>
          <el-button type="text" size="small" @click="handleDelete(scope.row.id)">删除</el-button>
        </template>
      </el-table-column>
    </el-table>



    <el-pagination
      :current-page="currentPage"
      :page-sizes="[5,10,20]"
      :page-size="10"
      layout="total, sizes, prev, pager, next, jumper"
      :total="total"
      @size-change="fetchData"
      @current-change="fetchData"
    />
    <el-dialog title="编辑" :visible.sync="dialogFormVisible">
      <el-form label-width="80px">
        <el-form-item label="广告位置">
          <el-radio-group v-model="pojo.position">
            <el-radio v-for="item in positions"
                      :key="item.id" :label="item.id">{{ item.value }}
            </el-radio>

          </el-radio-group>
        </el-form-item>
        <el-form-item label="图片">
          <el-upload
            class="avatar-uploader"
            action="/api/uploadImage"
            name="image"
            :show-file-list="false"
            :on-success="handleAvatarSuccess"
            :before-upload="beforeAvatarUpload"
          >
            <img v-if="imageUrl" :src="imageUrl" class="avatar">
            <i v-else class="el-icon-plus avatar-uploader-icon" />
          </el-upload>
        </el-form-item>
        <el-form-item label="描述"><el-input v-model="pojo.description" /></el-form-item>
        <el-button type="primary" @click="handleSave()">保存</el-button>
        <el-button @click="dialogFormVisible = false">关闭</el-button>
      </el-form>
    </el-dialog>
  </div>
</template>
<script>
import bannerApi from '@/api/banner'
import moment from 'moment'
export default {
  data() {
    return {
      list: [],
      total: 0, // 总记录数
      currentPage: 1, // 当前页
      pageSize: 10, // 每页大小
      searchMap: {}, // 查询条件
      dialogFormVisible: false, // 编辑窗口是否可见
      pojo: {}, // 编辑表单绑定的实体对象
      id: '', // 当前用户修改的ID
      imageUrl:'',
      positions: [{
        'id': 1,
        'value': '首页顶部'
      },
        {
          'id': 2,
          'value': '首页中部'
        }
      ]
    }
  },
  created() {
    this.fetchData()
  },
  methods: {
    fetchData() {
      bannerApi.search(this.currentPage, this.pageSize, this.searchMap).then(response => {
        this.list = response.data.rows
        this.total = response.data.total
      })
    },
    handleSave() {
      this.pojo.image = this.imageUrl
      bannerApi.update(this.id, this.pojo).then(response => {
        this.$message({
          message: response.message,
          type: (response.flag ? 'success' : 'error')
        })
        if (response.flag) { // 如果成功
          this.fetchData() // 刷新列表
        }
      })
      this.dialogFormVisible = false // 关闭窗口
    }, dateFormat: function(row, column) {
      var date = row[column.property]

      if (date == undefined) { return '' }

      return moment(date).format('YYYY-MM-DD')
    },
    handleEdit(id) {
      this.id = id
      this.pojo.image = this.imageUrl
      this.dialogFormVisible = true // 打开窗口
      if (id !== '') { // 修改
        bannerApi.findById(id).then(response => {
          if (response.flag) {
            this.pojo = response.data
            this.imageUrl=this.pojo.image
          }
        })
      } else {
        this.pojo = {} // 清空数据
        this.imageUrl=""
      }
    },
    handleDelete(id) {
      this.$confirm('确定要删除此纪录吗?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).then(() => {
        bannerApi.deleteById(id).then(response => {
          this.$message({ message: response.message, type: (response.flag ? 'success' : 'error') })
          if (response.flag) {
            this.fetchData() // 刷新数据
          }
        })
      })
    },
    handleAvatarSuccess(res, file) {
      this.imageUrl = file.response.data
    },
    beforeAvatarUpload(file) {
      const isJPG = file.type === 'image/jpeg'
      const isLt2M = file.size / 1024 / 1024 < 2

      if (!isJPG) {
        this.$message.error('上传头像图片只能是 JPG 格式!')
      }
      if (!isLt2M) {
        this.$message.error('上传头像图片大小不能超过 2MB!')
      }
      return isJPG && isLt2M
    }
  }
}
</script>
